Locomotive fire box



Jan. 16, 1923. 1,442,678. B. c. MURDEN.

LOCOMOTIVE FIRE BOX.

FILED SEPT- 14. 1921..

3 cum.

M 61mm;

Patented Jan. 16, 1923.

a'rnnr BAYARD C. MURDEN, OF MIAIHI, FLOR-IDA, ASSIGNOR OF ONE-THIRD TDDQROTI-IY A. IKEU'RDEN AND ONE-THIRD T E. MeoVEIGI-I, BOTH OF MIAMI,FLORIDA.

i LOCOMG'IIVE rmn Box.

Application filed September 14, 1921.

To all to 7mm it may concern Be it known that I, BAYARD C. MURDEN,citizen of the United States, residing at ihliami, in the county of Dadsand State of Florida, have invented certain new and useful Improvementsin Locomotive F ire Boxes, of which the following is a specification,reference being had therein to the accompanying drawing.

. This invention relates to improvements in locomotive fire boxes andmore particularly to an improved refractory brick employed in the liningof the fire box of an oil burning engine.

Prior to the present invention ordinary coal burning locomotive fireboxes have been reconstructed for the purpose of burning oil in the firebox instead of coal, and in order to accomplish this purpose the firebox has been provided with an oil burner and with fire bricks to protectthe table and tube sheets from the intense heat generated by the firewithin the fire box.

With these prior constructions the point at which the burner enters thefire box has been left uncovered and the fire bricks on the oppositesides of the burner have not been held in spaced relation from theburner. As a result the tube sheet at the point where the burner entershas been quickly destroyed owing to the intense heat and in some casesthe. fire bricks on opposite sides of the burner have fallen. over uponthe burner and due to their intense heat the brass of the burner hasbeen melted, and consequently, the efficiency of the burner has beendestroyed.

It is the primary object of the present invention to furnish an improvedbrick adapted to lie between the fire bricks on opposite sides of theburner and to protect the tube sheet in the rear of the burner. Thisfire brick is so constructed that if it falls inwardly it will clear theburner and consequently will not melt the brass from which the burner isformed. In addition to this the fire brick provides a recess to permitcondensations within the fire box to flow outwardly.

With the foregoing objects outlined, and With other objects in viewwhich will appear as the description proceeds, the invention consists inthe novel features hereinafter described in detail, illustrated in theSerial No. sooner accompanying drawing, and more particularly pointedout in the appended claims.

eferring to the drawing:

Figure 1 is a longitudinal sectional View of a portion of a locomotivetaken through the fire box.

Fig. 2 is a vertical sectional view of the same.

Fig. 3 is a perspective view of the improved fire brick.

In the drawing, 1 designates a fire box from which the heated gases passinto a boiler 2. 3 designates the locon'iotive cab and 4 isthe dooropening of the fire box. The fire box in the present instance isprovided with a refractory bottom plate 5 which is inclined toward thefront of the fire box in order that the condensates produced within thefire boxmay drain out through an aperture 6 provided in the tube sheet7. The tube sheet is protected on'opposite sides of the burner 7 bymeans of fire bricks 8 some of which have damper controlled apertures 9to admit air to the interior of the fire box. 10 designates the tablesheet of the fire box which is protected from the heat within the firebox by means of table sheet fire bricks 11 and by the upper ends of thefire bricks 8. Arranged between the fire bricks 8 at the opposite sidesof the burner 7" is my improved fire brick 12 which is preferably ofH-shape and includes paralled vertical legs 13 connected by anintermediate cross bar 14:. The fire brick 12 is provided with upper andlower recesses 15 and 16. This specifically formed fire brick protectsthe tube sheet 7 and permits the burner 7 to project into the fire box,and the condensates to drain out through the aperture 6. It will thus beunderstood that the brick 12 prevents the bricks 8 on its opposite sidesfrom falling toward the burner. If the brick 12 falls inwardly itsaperture 15 will permit the same to clear the burner and consequentlythe hot fire brick will not contact with the burner and cause itsdestruction.

I have found in actual practice that a fire box which is not protectedat the point occupied by the brick 12, has a portion of the tube sheet 7destroyed within three months while the addition of my improved firebrick 12 protects the tube sheet 7 and the inner edge of the table sheet10 for a period of approximately two years. It will thus be understoodthat the improved fire brick adds to the life of the sheets of the firebox and prevents the destruction of the oil burner.

The oil burner is supplied by means of a pipe 17.

From the foregoing I believe that the construction, operation andadvantages of my improved construction may be readily understood. bythose skilled in the art, and I am aware that various changes may bemade the last mentioned brick from the burner, said tube sheet beingprovided with a drain aperture, and the last mentioned fire brick havina recess to permit condensates to flow from the fire box through saidaperture.

2. A locomotive fire box including an inclined bottom and a tube sheet,a burner extending through said tube sheet, a substantially H-shapedrefractory fire brick arranged within the fire box to protect a portionof the tube sheet and spaced away from the burner, a drain aperture inthe tube sheet, said brick providing a recess'to permit condensates toflow from the interior of the fire box through said aperture, andordinary fire bricks arranged on opposite sides of the H-shaped brickfor protecting the remaining ortion of the tube sheet.

In testimony whereof I hereunto afiix my signature in the presence oftwo witnesses.

BAYARD G, MURDEN. [Ls] Witnesses:

E. B. KURTZ, LOUISE REINEoKn,

